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Apache Commons Imaging (previously Sanselan) is a pure-Java image library.
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.commons.imaging.formats.tiff.write;
import static org.apache.commons.imaging.formats.tiff.constants.TiffConstants.TIFF_ENTRY_MAX_VALUE_LENGTH;
import java.io.IOException;
import java.nio.ByteOrder;
import java.util.Arrays;
import org.apache.commons.imaging.ImageWriteException;
import org.apache.commons.imaging.common.BinaryOutputStream;
import org.apache.commons.imaging.formats.tiff.fieldtypes.FieldType;
import org.apache.commons.imaging.formats.tiff.taginfos.TagInfo;
public class TiffOutputField {
public final int tag;
public final TagInfo tagInfo;
public final FieldType fieldType;
public final int count;
private byte[] bytes;
private final TiffOutputItem.Value separateValueItem;
private int sortHint = -1;
private static final String NEWLINE = System.getProperty("line.separator");
public TiffOutputField(final TagInfo tagInfo, final FieldType tagtype, final int count,
final byte[] bytes) {
this(tagInfo.tag, tagInfo, tagtype, count, bytes);
}
public TiffOutputField(final int tag, final TagInfo tagInfo, final FieldType fieldType,
final int count, final byte[] bytes) {
this.tag = tag;
this.tagInfo = tagInfo;
this.fieldType = fieldType;
this.count = count;
this.bytes = bytes;
if (isLocalValue()) {
separateValueItem = null;
} else {
final String name = "Field Seperate value (" + tagInfo.getDescription()
+ ")";
separateValueItem = new TiffOutputItem.Value(name, bytes);
}
}
protected static TiffOutputField createOffsetField(final TagInfo tagInfo,
final ByteOrder byteOrder) throws ImageWriteException {
return new TiffOutputField(tagInfo, FieldType.LONG, 1,
FieldType.LONG.writeData(0, byteOrder));
}
protected void writeField(final BinaryOutputStream bos) throws IOException,
ImageWriteException {
bos.write2Bytes(tag);
bos.write2Bytes(fieldType.getType());
bos.write4Bytes(count);
if (isLocalValue()) {
if (separateValueItem != null) {
throw new ImageWriteException("Unexpected separate value item.");
}
if (bytes.length > 4) {
throw new ImageWriteException(
"Local value has invalid length: " + bytes.length);
}
bos.write(bytes);
final int remainder = TIFF_ENTRY_MAX_VALUE_LENGTH - bytes.length;
for (int i = 0; i < remainder; i++) {
bos.write(0);
}
} else {
if (separateValueItem == null) {
throw new ImageWriteException("Missing separate value item.");
}
bos.write4Bytes((int) separateValueItem.getOffset());
}
}
protected TiffOutputItem getSeperateValue() {
return separateValueItem;
}
protected final boolean isLocalValue() {
return bytes.length <= TIFF_ENTRY_MAX_VALUE_LENGTH;
}
public boolean bytesEqual(final byte[] data) {
return Arrays.equals(bytes, data);
}
protected void setData(final byte[] bytes) throws ImageWriteException {
// if(tagInfo.isUnknown())
// Debug.debug("unknown tag(0x" + Integer.toHexString(tag)
// + ") setData", bytes);
if (this.bytes.length != bytes.length) {
throw new ImageWriteException("Cannot change size of value.");
}
// boolean wasLocalValue = isLocalValue();
this.bytes = bytes;
if (separateValueItem != null) {
separateValueItem.updateValue(bytes);
}
// if (isLocalValue() != wasLocalValue)
// throw new Error("Bug. Locality disrupted! "
// + tagInfo.getDescription());
}
@Override
public String toString() {
return toString(null);
}
public String toString(String prefix) {
if (prefix == null) {
prefix = "";
}
final StringBuilder result = new StringBuilder();
result.append(prefix);
result.append(tagInfo);
result.append(NEWLINE);
result.append(prefix);
result.append("count: ");
result.append(count);
result.append(NEWLINE);
result.append(prefix);
result.append(fieldType);
result.append(NEWLINE);
return result.toString();
}
public int getSortHint() {
return sortHint;
}
public void setSortHint(final int sortHint) {
this.sortHint = sortHint;
}
}